Php/docs/class.mongodb-bson-undefined

• PHP Manual
• MongoDB\BSON
• The MongoDB\BSON\Undefined class (deprecated)

(mongodb >=1.4.0)

简介

BSON type for the "Undefined" type. This BSON type is deprecated, and this class can not be instantiated. It will be created from a BSON undefined type while converting BSON to PHP, and can also be converted back into BSON while storing documents in the database.

类摘要

final MongoDB\BSON\Undefined implements MongoDB\BSON\Type , Serializable , JsonSerializable {

/* 方法 */

final private __construct ( )

final public jsonSerialize ( ) : mixed

final public serialize ( ) : string

final public __toString ( ) : string

final public unserialize ( string $serialized ) : void

}

Table of Contents

• MongoDB\BSON\Undefined::__construct — Construct a new Undefined (unused)
• MongoDB\BSON\Undefined::jsonSerialize — Returns a representation that can be converted to JSON
• MongoDB\BSON\Undefined::serialize — Serialize a Undefined
• MongoDB\BSON\Undefined::__toString — Returns an empty string
• MongoDB\BSON\Undefined::unserialize — Unserialize a Undefined